# pval: P Value for a Monte Carlo Test of Polygon Overlapping In overlapptest: Test Overlapping of Polygons Against Random Rotation

## Description

Computes the p-value and sign of deviation for the hypothesis that the first value in a vector is larger or smaller (i.e., a two-sided test) than the expected value represented by all the other values in the vector, or alternatively, computes a one-sided test.

## Usage

 `1` ```pval(x, alternative=c("two.sided", "less", "greater")) ```

## Arguments

 `x` A vector, usually with some observed statistic in the first position (the observed overlapp) followed by a sequence of the same statistic computed for several realizations of a null model against which we test our hypothesis (i.e., a sequence of simulated, i.e., rotated, overlapps). `alternative` a character string specifying the alternative hypothesis, must be one of "two.sided" (default), "greater" or "less". You can specify just the initial letter.

## Value

Vector of length one whose absolute value represents the p-value and whose sign indicates wether the first value in `x` is larger (positive) or smaller (negative) than the expected value.

## Author(s)

Marcelino de la Cruz

## Examples

 ```1 2 3 4 5``` ```pval(c(0,1:99)) pval(c(100,1:99)) pval(c(100,1:199)) pval(c(200,1:199)) pval(c(0,1:199)) ```

overlapptest documentation built on March 16, 2021, 1:08 a.m.